12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Depression of the energy gap at a surface in 3H...
View graph of relations

« Back

Depression of the energy gap at a surface in 3He-B; the evidence from thermal boundary conductance

Research output: Contribution to journalLetter

Published

Journal publication date20/06/1986
JournalJournal of Physics C: Solid State Physics
Journal number17
Volume19
Number of pages6
PagesL351-L356
Original languageEnglish

Abstract

A simple expression for the heat flux between sintered silver powder and 3He-B is derived. The heat flux in the superfluid state is expressed in terms of that in the normal state, without the precise mechanism of heat transfer needing to be specified. A comparison with recent measurements suggests that the energy gap involved is a factor of 0.65 of the bulk value. This implies that the gap is depressed near a boundary and that processes occurring close to the boundary dominate the thermal exchange mechanism.